The BeforeFolderMove event is not called by a custom application after a while in Outlook 2007

In Microsoft Office Outlook 2007, the BeforeFolderMove event is not called by a custom application after a while.

For example, there is a custom application which you can run to create a new folder that contains several subfolders for Outlook 2007. The application calls the BeforeFolderMove event, in which the cancel property is set to true to prevent users from moving folders. When you run the application and then try to move the folders, they cannot be moved. However, after several tries, you can move the folders.

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base: To resolve this problem, install the Outlook 2007 hotfix package that is dated June 30, 2009 and then set the value for the ReliableFolderMoveEvent registry entry to enable the hotfix package. To do this, follow these steps:

1. Install the Outlook 2007 hotfix package that is dated June 30, 2009. For more information about this hotfix package, click the following article number to view the article in the Microsoft Knowledge Base:
   970944  (http://support.microsoft.com/kb/970944/ ) Description of the Outlook 2007 hotfix package (Outlook.msp): June 30, 2009
2. Set the value for the ReliableFolderMoveEvent registry entry to enable the hotfix. To do this, follow these steps:
   1. Click Start, click Run, type regedit, and then click OK.
   2. Locate and then click the following registry subkey:
      HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Preferences
   3. On the Edit menu, point to New, and then click DWORD Value.
   4. Type ReliableFolderMoveEvent, and then press ENTER.
   5. Right-click ReliableFolderMoveEvent, and then click Modify.
   6. In the Value data box, type 1, and then click OK.
   7. Exit Registry Editor.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.